Welcome to the longest staring contest of your life. You’re about to go seven days without blinking. What device would keep your eyes forced open? How long would it take...
Uncontrollable itching. Sleepless nights. Incredible stench. Uh oh, it looks like you could have a head lice infestation. Where would you get the lice from? How fast...
During Earth’s early days, a gargantuan collision left our planet spinning at an angle. That slight incline allowed life as you know it to flourish. But what if this...
OK, if you’re a regular viewer of What If, you know we’ve already explored the idea of finding silicon-based alien life. But what if we didn’t have to...
Greetings, future moonling. That’s right. You are among the first generation of children born on the Moon. How would your birth compare to every previous human’s...
Welcome to your worst nightmare. You’ve lost your balance and fell into a pool of slimy parasitic animals that eat only one thing. Your blood. What would happen if...
Before you cannonball into that refreshing pool, look before you leap. It could just be filled to the brim with blood-sucking lampreys. And they’re hungry. How would...
Absolute zero is the lowest possible temperature in the Universe. Nothing gets colder than that. So if the entire Earth suddenly cooled down to the most frigid...
What’s the best place to put solar panels? Close to the Sun, of course. And in this scenario, we’re going to build the most efficient solar farm possible...
Beware. After many millions of years, the T. rex is back. And this giant, scary predator is setting its hungry eyes on you. What would running into this dinosaur be like...
Ever wonder what it would feel like to step into an oven? Welcome to Death Valley, California. Temperatures here can climb to a scorching 54.4 ºC (130 ºF), which is as...
What would happen if you obtained space-bending abilities and decided to test them out by placing Earth between the two asteroid belts in our Solar System? The short...
Space tourism is much closer than you may think. The International Space Station will soon retire from its successful run through low Earth orbit. But humanity’s...
Don’t be fooled by these gentle waves. These still waters hide a 20 million year death match between two prehistoric monsters. Grab some popcorn and a snorkel. You...
A black hole is on a collision course with our Sun. And there’s nothing left for you to do except sit back and watch the destruction of our entire Solar System. How...
You’re cut off from civilization and stuck in one of the most unforgiving wastelands on Earth. Don’t count on a rescue anytime soon. You’re stranded in...
Feel like upping the stakes of your late-night skinny dips? Welcome to Lake Nyos, one of the most dangerous lakes on the planet. Here, your cannonball might just take...
Under the pressure of crushing economic sanctions, Russia’s straining to play its own intimidation game. This time, they are threatening to take the International...
Why does the Earth have to be either round or flat? What if there could be a happy middle ground? Welcome to your very own polyhedron Earth. What would this Earth look...
That bump in the road may sound horrifying. But don’t worry. Its next stop could be in your stomach. So what would happen if you ate roadkill? What diseases could...
